Description
Key Characters:
Growth Form:
Shrubs or trees 0.3–6 m tall, sometimes palm-like and 1–14 m tall, terrestrial or rarely epiphytic, with white, yellow, or tan latex.
Stems:
Stems unarmed, muricate, or aculeate.
Roots:
Leaves:
Leaves simple.
Alternate.
Margins callose–toothed or pinnately lobed, cleft, parted, or divided, the lobes or segments then callose–toothed, lobed, or divided.
Petiolate.
Stipules absent.
Flowers:
Flowers 5–25(–40) in axillary racemes, the rachis sometimes not expanded, the raceme thus appearing subumbellate; hypanthium obconical or obovoid, rarely ovoid, oblong, or depressed–obovoid.
Flowers bisexual (perfect) or rarely unisexual, sometimes resupinate, usually protandrous, rarely cleistogamous.
Calyx 5-lobed, lobes dentiform, triangular, or oblong, rarely linear, distinct or rarely connate, much shorter to somewhat longer than hypanthium, rarely up to as long as the corolla, tube adnate to ovary.
Corolla zygomorphic, glabrous or pubescent, rarely muricate, the tube suberect to strongly arcuate, dorsally cleft to about the middle, the lobes connate, spreading, rarely erect or all 5 downcurved in the same plane.
Stamens 5, alternate with corolla lobes, connate; anthers with apical tufts of white hairs on the lower 2 or rarely all 5, dithecal, opening by longitudinal slits, coherent but separating after anthesis or connate and forming a tube into which pollen is shed; filaments distinct or connate above, attached to the epigynous nectary disk or to base of corolla, rarely adnate to corolla tube.
Ovary inferior, 2-celled; ovule placentation axile; stigma 2-lobed, wet or dry, appressed and nonreceptive as the style grows through the anther tube, pushing out the pollen, after which the stigmas spread apart and become receptive.
Fruit:
Fruit a yellow; orange; or purple berry.
Seeds numerous; small; brown to black; smooth; shiny; 0.2–0.5(–2) mm long; with a straight; short to spatulate dicotyledonous embryo embedded in oily endosperm.
Ploidy:
2n = 28
Habitat:
Elevation Range: